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Table No. 1 <br />Lafarge West, Inc. Applegate <br />Rich Pit, M-85-218 <br /> Group, Inc. <br />Substitute Water Supply Plan - Evaporative Losses in 2009 <br />Percent of Gross Lake Effective Net Lake Total Lake 2009 Lagged <br />Month Annual <br />Evaporation Evaporation <br />(ft) Precipitation <br />i Precipitation Evaporation Evaporation Depletions <br /> ( <br />n) (ft) (acre-ft/acre) (ac-ft) (ac-ft) <br />) <br />Apr 9.0% 0.38 C <br />1.23 D <br />0O <br />..0077 E <br />0 <br />30 F G <br /> <br />May 12.0% <br />0.50 H <br />1 <br />48 7 . 4.92 4.07 <br /> . . 0.41 6.70 <br />5 <br />51 <br />June 14.5% 0.60 <br />1.37 <br />0.08 <br />0.52 <br />8 <br />49 . <br /> <br />July 15.0% <br />0.63 <br />1.92 <br /> <br />0 <br />11 <br /> <br />0 <br />51 . 7.00 <br /> <br />Aug 13.5% <br />0.56 <br />2 <br />09 . <br />0 <br />12 . 8.31 7.43 <br /> . . 0.44 7.14 6 <br />91 <br />Sept 10.0% 0.42 0.84 0.05 0 <br />37 5 <br />96 . <br /> <br />Oct 7.0% <br />0.29 <br />0.74 <br />0.04 . <br />0 <br />25 . <br />4 <br />03 6.08 <br /> <br />Nov 4.0% <br />0.17 <br />0.52 <br />0.03 . <br />0 <br />14 . <br />2 <br />21 4.75 <br /> <br />Dec 3.0% <br />0.13 <br />0.34 <br />0.02 . <br />0 <br />10 . <br />1 <br />70 3.27 <br /> <br />Jan 3.0% <br />0.13 <br />0.32 <br />0.02 . <br />0 <br />11 . <br />1 <br />72 2.48 <br /> <br />Feb 3.5% <br />0.15 <br />0.30 <br />0.02 . <br />0.13 . <br />2 <br />08 2.22 <br /> <br />Mar 5.5% <br />0.23 <br />0.85 <br />0.05 <br />0.18 . <br />2 <br />91 2.32 <br /> <br />Total 100% <br />717 <br />12.00 <br />0.70 <br />3.47 . <br />56 <br />16 2.79 <br /> . 54.83 <br />Total Exposed Water Surface = 16.2 acres - ( 16.2 acres exposed pit area) <br />Annual Precipitation = 12.00 inches -Estimated using CDSS website <br />Gross Annual Evaporation = 50 inches - Estimated us ing NOAA Technical Report NWS 33 <br />(A) Percent of annual evaporation from SEO guidelines for elevations < 6,500 feet <br />(B) Gross lake evaporation, (B) _ (A) * [gross annual evaporation/12] <br />(C) Annual total from CDSS, monthly distribution estimated using precipitation data from Colorado Climate Center website for Pueblo, CO Weather Station <br />(D) Effective precipitation, (D) _ [(C)/12] * 70% <br />(E) Net lake evaporation, (E) _ (B) - (D) <br />(F) Total lake evaporation, (F) _ (E) * exposed surface area <br />(G) Lagged evaporative depletions from Appendix A <br />NV9100 Lafarge SWSPs & Compliance0isciplines (Technical)\WRPM\Water R19htSZWSP11AACansas\Supp1y Demand-Rich Pit - WY 2009 01.26.09.xlsx <br />1/27/2009